Hisatsugu Yamasaki

Bayesian-Driven First-Principles Calculations for Accelerating Exploration of Fast Ion Conductors for Rechargeable Battery Application

Safe and robust batteries are urgently requested today for power sources of electric vehicles. Thus, a growing interest has been noted for fabricating those with solid electrolytes. Materials search by density functional theory (DFT) methods offers great promise for finding new solid electrolytes but the evaluation is known to be computationally expensive, particularly on ion migration property. In this work, we proposed a Bayesian-optimization-driven DFT-based approach to efficiently screen for compounds with low ion migration energies (

Numerical study of Li diffusion in polycrystalline LiCoO2

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Effect of microstructure on discharge properties of polycrystalline LiCoO2

Eb). We demonstrated this on 318 tavorite-type Li- and Na-containing compounds. We found that the scheme only requires ~30% of the total DFT-

Phase-field modeling of stress generation in polycrystalline LiCoO2

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Cathode active material for lithium battery, lithium battery, and method for producing cathode active material for lithium battery

Eb evaluations on the average to recover the optimal compound ~90% of the time. Its recovery performance for desired compounds in the tavorite search space is ~2× more than random search (i.e., for